Appearance, Miguel de Cervantes

All that glisters is not gold.

- Miguel de Cervantes (1547-1616), Don Quixote (1605-15), Part II, Chapter XXXIII. Googe—Eglogs, etc. (1563). Udall—Ralph Royster Doyster. (1566).

http://en.wikiquote.org/wiki/Appearance

Wisdom, British Proverb

All is not gold that glitters.

- British Proverb